Finding the Third Proportional to 210,963 and 429,759.50

Step by Step Solution

1. Step 1: Write the proportion equation
   210,963 : 429,759.50 = 429,759.50 : x
2. Step 2: Convert to fraction form
   210,963/429,759.50 = 429,759.50/x
3. Step 3: Cross multiply
   210,963x = 429,759.50 × 429,759.50
4. Step 4: Simplify right side
   210,963x = 184,693,227,840.25
5. Step 5: Solve for x
   x = 184,693,227,840.25/210,963
6. Step 6: Final answer
   x = 875,476.87